<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <title>小黑记事本</title>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <meta name="robots" content="noindex, nofollow" />
    <meta name="googlebot" content="noindex, nofollow" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link rel="stylesheet" type="text/css" href="./css/Bookindex.css" />
    <script type="text/javascript" src="../js/vue.js"></script>
  </head>

  <body>
    <!-- 主体区域 -->
    <section id="todoapp">
      <!-- 输入框 -->
      <header class="header">
        <h1>小黑记事本</h1>
        <input
          autofocus="autofocus"
          autocomplete="off"
          placeholder="请输入任务"
          class="new-todo"
          @keyup.enter="enter"
          v-model="count"
        />
        <!--v-model会实现双向绑定:表达元素内容改变时，vue中对于的数据也会改变，vue中的数据改变对于的表单元素也会改变-->
      </header>
      <!-- 列表区域 -->
      <section class="main">
        <ul class="todo-list">
          <li class="todo" v-for="(item,index) in msg">
            <div class="view">
              <span class="index"> {{index+1}}</span> <label>{{item}}</label>
              <button class="destroy" @click="deleteFunc(index)"></button>
            </div>
          </li>
        </ul>
      </section>
      <!-- 统计和清空 -->
      <footer class="footer">
        <span class="todo-count"> <strong>{{msg.length}}</strong> items left </span>
        <button class="clear-completed" @click="clear">
          Clear
        </button>
      </footer>
    </section>
    <!-- 底部 -->
    <footer class="info">
      <p>
        <a href="http://www.baidu.com"
          ><img src="./img/logo.png" alt=""
        /></a>
      </p>
    </footer>
  </body>
<script>
  let todoapp=new Vue({
    el:"#todoapp",
    data:{
   msg:["吃桃桃","好凉凉"],
      count:"",
    },
    methods:{
      enter(){
        this.msg.push(this.count)
      },
      deleteFunc(index){
        this.msg.splice(index,1);
      },
      clear(){
        this.msg=[]
      }
    }
  })
</script>
</html>
